Date: Wed, 15 Jun 2011 22:13:52 +0100 From: Matthew Seaman <m.seaman@infracaninophile.co.uk> To: freebsd-questions@freebsd.org Subject: Re: free sco unix Message-ID: <4DF92090.3020805@infracaninophile.co.uk> In-Reply-To: <4DF9174F.50708@danskdatacenter.dk> References: <4DF9174F.50708@danskdatacenter.dk>
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This is an OpenPGP/MIME signed message (RFC 2440 and 3156) --------------enig15736ED7BA866A6DB40DA5A7 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable On 15/06/2011 21:34, Thomas Hansen wrote: > one of my mates teacher says that unix is free and your system running > like UnixWare / SCO UNIX and .... and that unix is free Some Unix is free (the best sorts), others are most certainly not free at all. FreeBSD is pretty much the opposite end of the Unix spectrum to UnixWare / SCO -- so, yes there is plenty in common like the flat namespace, the concept of 'everything is a stream of bytes', many of the standard applications. Many things are completely different -- ps(1) and df(1) for example are quite different between pure-bred *BSD (like FreeBSD) and pedigree SysV (like SCO). Aside: Linux is not unix (the clue is in the name) -- except by the duck test. It walks like a duck and quacks like a duck... but it's a whole different breed of waterfowl entirely, and has origins independent of the primordial Unix systems. Even so, it does provide a pretty complete emulation of a fairly middle of the road BSD--SysV hybrid. > Do your BSD kernel run the same unix kernel as unixware No. Absolutely not. Way back in the 1980's there were some common ancestral systems from which each has inherited bits of code[*], but development has been quite separate for the last 30 years or so. Cheers, Matthew [*] Well, there has always been some cross fertilization, even after the development tracks split apart. Lookup the history of the AT&T vs. Regents of the University of California lawsuit and how that all came to an end. --=20 Dr Matthew J Seaman MA, D.Phil. 7 Priory Courtyard Flat 3 PGP: http://www.infracaninophile.co.uk/pgpkey Ramsgate JID: matthew@infracaninophile.co.uk Kent, CT11 9PW --------------enig15736ED7BA866A6DB40DA5A7 Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG/MacGPG2 v2.0.16 (Darwin) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iEYEARECAAYFAk35IJkACgkQ8Mjk52CukIwFWQCdH9Uonn/d1Rjcrb5DTf+mpren XUwAoItf7Ajd4zyRB0RqpEa+PwzQj2qo =zkkG -----END PGP SIGNATURE----- --------------enig15736ED7BA866A6DB40DA5A7--
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